天鵝座NML
天鵝座NML（英文：NML Cygni）係一粒紅特超巨星[1]，係依家嚟講喺已經知道嘅恆星入面體積第二大，半徑大約係太陽嘅1650倍。天鵝座NML亦都係光度最高嘅恆星之一[2]，同地球距離大約差5500光年（即係大約5.20329062×1019 m）[2]。天鵝座NML周圍有好多塵圍住[1][3]，亦有一個豆形嘅不規則星雲[4]。佢亦係一粒週期大約940日嘅半規則變星[3]。天鵝座NML係一粒超大嘅有氧恆星[5]。喺佢嘅周圍發現到嘅分子有 H2O、SiO、CO、HCN、CS、SO、SO2同埋H2S等等。
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攷[編輯]
- ↑ 1.0 1.1 b. Zhang; m. j. Reid; k. m. Menten; x. w. Zheng; a. Brunthaler (August 2012). "The Distance and Size of the Red Hypergiant NML Cyg from VLBA and VLA Astrometry". Astronomy & Astrophysics.
{{cite journal}}: CS1 maint: multiple names: 作者名單 (link) - ↑ 2.0 2.1 Michael Thomas Schuster (2007). Investigating the Circumstellar Environments of the Cool Hypergiants. ProQuest. p. 57. ISBN 978-0-549-32782-0. 喺27 August 2012搵到.
{{cite book}}: CS1 maint: url-status (link) - ↑ 3.0 3.1 Schuster, M. T.; Marengo, M.; Hora, J. L.; Fazio, G. G.; Humphreys, R. M.; Gehrz, R. D.; Hinz, P. M.; Kenworthy, M. A.; 等 (July 2009). "Imaging the Cool Hypergiant NML Cygni's Dusty Circumstellar Envelope with Adaptive Optics". The Astrophysical Journal.
{{cite journal}}: Explicit use of et al. in:|author=(help)CS1 maint: multiple names: 作者名單 (link) - ↑ Schuster, M. T.; Humphreys, R. M.; Marengo, M. (January 2006). "The Circumstellar Environments of NML Cygni and the Cool Hypergiants". The Astronomical Journal.
{{cite journal}}: CS1 maint: multiple names: 作者名單 (link) - ↑ "Combined Array for Research in Millimeter-wave Astronomy" (PDF). 喺August 27, 2012搵到.